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AI.VII.I.K5FAA-S-ACS-25 · Nov 2023Knowledge

Appropriate use of glassy water takeoff and climb technique.

ACS element text (the applicant demonstrates understanding of)

Appropriate use of glassy water takeoff and climb technique.

Bottom line

Glassy water makes takeoff more difficult because the smooth surface increases drag, making acceleration and lift-off more difficult. Once the seaplane lifts off, establish a positive rate of climb to prevent inadvertently flying back into the water.

FAA references

  1. SEA ch. 4 (p. 4-15) — FAA-H-8083-23
  2. AIM 7-6-14 (Flying in Flat Light, Brown Out Conditions, and White Out Conditions) — AIM Basic 2/20/25 w/ Change 1 (8/7/25) & Change 2 (1/22/26)
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